wrote in message
ups.com...

But, I don't have a schematic and don't want to start investing in a
lot of $$$ if there is a major problem, as I don't really need the
monitor, but would fix it and give it away.

If you haven't already checked, this may help in locating the schematic:
https://gullfoss2.fcc.gov/prod/oet/c...ericSearch.cfm